Oxidation of Cylcohexanone to ε-Caprolactone over SCM-14 Zeolite
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China
Abstract：A new stable germanosilicate zeolite SCM-14 was hydrothermally synthesized using commercially available 4-pyrrolidinopyridine as organic structure-directing agents. The structure and properties of the catalysts were systematically characterized. These studies indicated that SCM-14 zeolite not only had a large surface area (166 m2/g), but also had Lewis and Br?nsted acid sites. The Baeyer-Villiger oxidation of cyclohexanone to ε-caprolactone was catalyzed by Lewis acid sites of SCM-14 zeolite. The influence of several variables including solvent, H2O2 concentration, catalyst dosage, H2O2/cyclohexanone ratio, reaction temperature and time on the extent of cyclohexanone conversion and ε-caprolactone selectivity were studied. Under optimal conditions, the ε-caprolactone selectivity reached 63.8% with 46.5% cyclohexanone conversion. Besides, SCM-14 zeolite had a good stability.
